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If you can play Minecraft on that PC, you shouldn't have a problem using Optifine on that PC. You might not be able to take advantage of some of the settings but, as far as I know, you should have no problem using it.

Quote from EnderSlainer»

i using laptop instead, but still got the issues

Edit: oh wait, wait. I have found the answer: i must install GLSL Shaders Mod and Sildur's Shaders Mod mod for Minecraft. So, i has added them to Minecraft, but i still got the same message:

Here the second message after i added Shaders Mod:

---- Minecraft Crash Report ----

WARNING: coremods are present:
Contact their authors BEFORE contacting forge

// You're mean.

Time: 2/6/16 11:24 AM
Description: Initializing game

java.lang.NoSuchFieldError: DEFAULT_BAKED_FORMAT
at net.minecraftforge.client.model.Attributes.<clinit>(Attributes.java:24)
at net.minecraftforge.client.model.ModelLoader$VanillaModelWrapper.bake(ModelLoader.java:503)
at net.minecraftforge.client.model.ModelLoader.func_177570_a(ModelLoader.java:139)
at net.minecraft.client.resources.model.ModelManager.func_110549_a(ModelManager.java:28)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110542_a(SimpleReloadableResourceManager.java:120)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:478)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:329)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at net.minecraftforge.client.model.Attributes.<clinit>(Attributes.java:24)
at net.minecraftforge.client.model.ModelLoader$VanillaModelWrapper.bake(ModelLoader.java:503)
at net.minecraftforge.client.model.ModelLoader.func_177570_a(ModelLoader.java:139)
at net.minecraft.client.resources.model.ModelManager.func_110549_a(ModelManager.java:28)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110542_a(SimpleReloadableResourceManager.java:120)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:478)

-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:329)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
Minecraft Version: 1.8.9
Operating System: Windows 8.1 (x86) version 6.3
Java Version: 1.8.0_45, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 143185016 bytes (136 MB) / 256356352 bytes (244 MB) up to 523501568 bytes (499 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.19 Powered by Forge 11.15.1.1732 3 mods loaded, 3 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCH mcp{9.19} [Minecraft Coder Pack] (minecraft.jar)
UCH FML{8.0.99.99} [Forge Mod Loader] (forge-1.8.9-11.15.1.1732.jar)
UCH Forge{11.15.1.1732} [Minecraft Forge] (forge-1.8.9-11.15.1.1732.jar)
Loaded coremods (and transformers):
GL info: ' Vendor: 'Intel' Version: '4.3.0 - Build 10.18.14.4029' Renderer: 'Intel(R) HD Graphics 5500'
Launched Version: 1.8.9-forge1.8.9-11.15.1.1732
LWJGL: 2.9.4
OpenGL: Intel(R) HD Graphics 5500 GL version 4.3.0 - Build 10.18.14.4029, Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs:
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 4x Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz

First Message

---- Minecraft Crash Report ----

WARNING: coremods are present:
Contact their authors BEFORE contacting forge

// Why is it breaking

Time: 2/6/16 11:05 AM
Description: Initializing game

java.lang.AbstractMethodError: net.minecraft.client.resources.model.ModelRotation.apply(Lcom/google/common/base/Optional;)Lcom/google/common/base/Optional;
at net.minecraftforge.client.model.IPerspectiveAwareModel$MapWrapper.getTransforms(IPerspectiveAwareModel.java:52)
at net.minecraftforge.client.model.ModelLoader$VanillaModelWrapper.bake(ModelLoader.java:526)
at net.minecraftforge.client.model.ModelLoader.func_177570_a(ModelLoader.java:139)
at net.minecraft.client.resources.model.ModelManager.func_110549_a(ModelManager.java:28)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110542_a(SimpleReloadableResourceManager.java:120)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:478)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:329)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at net.minecraftforge.client.model.IPerspectiveAwareModel$MapWrapper.getTransforms(IPerspectiveAwareModel.java:52)
at net.minecraftforge.client.model.ModelLoader$VanillaModelWrapper.bake(ModelLoader.java:526)
at net.minecraftforge.client.model.ModelLoader.func_177570_a(ModelLoader.java:139)
at net.minecraft.client.resources.model.ModelManager.func_110549_a(ModelManager.java:28)
at net.minecraft.client.resources.SimpleReloadableResourceManager.func_110542_a(SimpleReloadableResourceManager.java:120)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:478)

-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:329)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
Minecraft Version: 1.8.9
Operating System: Windows 8.1 (x86) version 6.3
CPU: 4x Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz
Java Version: 1.8.0_45, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 160438184 bytes (153 MB) / 276901888 bytes (264 MB) up to 523501568 bytes (499 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.19 Powered by Forge 11.15.1.1732 Optifine OptiFine_1.8.9_HD_U_G7 3 mods loaded, 3 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCH mcp{9.19} [Minecraft Coder Pack] (minecraft.jar)
UCH FML{8.0.99.99} [Forge Mod Loader] (forge-1.8.9-11.15.1.1732.jar)
UCH Forge{11.15.1.1732} [Minecraft Forge] (forge-1.8.9-11.15.1.1732.jar)
Loaded coremods (and transformers):
GL info: ' Vendor: 'Intel' Version: '4.3.0 - Build 10.18.14.4029' Renderer: 'Intel(R) HD Graphics 5500'
Launched Version: 1.8.9-forge1.8.9-11.15.1.1732
LWJGL: 2.9.4
OpenGL: Intel(R) HD Graphics 5500 GL version 4.3.0 - Build 10.18.14.4029, Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs:
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 4x Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz

What? No. You don't have to install shaders for Optifine to work. In fact, you CAN'T with newer versions of Optifine. They have Shaders Mod built in. Therefore you can't install Shaders Mod alongside it, it will crash.

Get rid of Shaders Mod if you've still got it installed and update Optifine. You're using G7, but the latest is H2 (excluding any previews that I am not aware of).