Grandle task failed and not being able to update to latest version

Hello! So i used 1.7.6 for a while but i was getting this error-

https://prnt.sc/iglrpv

Now i updated to 1.7.7 and i get error which says the same thing in first error and after i click ok, it shows me this error-

[spoiler]
Executing gradle command: cleanCache clean setupDecompWorkspace --refresh-dependencies
Microsoft Windows [Version 10.0.16299.125]
(c) 2017 Microsoft Corporation. Visas ties�bas patur‰tas.
C:\Pylo\MCreator177>cd forge
C:\Pylo\MCreator177\forge>SET "JAVA_HOME=C:\Pylo\MCreator177\jdk64\"
C:\Pylo\MCreator177\forge>SET JAVA_EXE=%JAVA_HOME%\bin\java.exe
C:\Pylo\MCreator177\forge>SET PATH=%JAVA_HOME%\bin\;%PATH%
C:\Pylo\MCreator177\forge>gradlew -Dorg.gradle.jvmargs="-Xms625m -Xmx2048m" cleanCache clean setupDecompWorkspace --refresh-dependencies 
This mapping 'snapshot_20171003' was designed for MC 1.12! Use at your own peril.
#################################################
         ForgeGradle 2.3-SNAPSHOT-315a0db        
  https://github.com/MinecraftForge/ForgeGradle  
#################################################
               Powered by MCP unknown               
             http://modcoderpack.com             
         by: Searge, ProfMobius, Fesh0r,         
         R4wk, ZeuX, IngisKahn, bspkrs           
#################################################
:cleanCache FAILED
BUILD FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':cleanCache'.
> Unable to delete file: C:\Users\DageLV\.gradle\caches\minecraft\net\minecraftforge\forge\1.12.2-14.23.1.2555\snapshot\20171003\forge-1.12.2-14.23.1.2555-srgBin.jar
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
Total time: 1 mins 25.82 secs
C:\Pylo\MCreator177\forge>
Task completed with return code 0 in 92068 milliseconds

[/spoiler]