UE4.17 Cant package any project

When i package my project it shows this :

UATHelper: Packaging (Windows (64-bit)): Running AutomationTool...
UATHelper: Packaging (Windows (64-bit)): Automation.ParseCommandLine: Parsing command line: -ScriptsForProject="C:/Users/ghost/Documents/Unreal Projects/CooP/CooP.uproject" BuildCookRun -nocompile -nocompileeditor -installed -nop4 -project="C:/Users/ghost/Documents/Unreal Projects/CooP/CooP.uproject" -cook -stage -archive -archivedirectory=C:/Users/ghost/Des
ktop -package -clientconfig=Development -ue4exe=UE4Editor-Cmd.exe -pak -prereqs -nodebuginfo -targetplatform=Win64 -build -utf8output
UATHelper: Packaging (Windows (64-bit)): BuildCookRun.SetupParams: Setting up ProjectParams for C:\Users\ghost\Documents\Unreal Projects\CooP\CooP.uproject
UATHelper: Packaging (Windows (64-bit)): Project.Build: ********** BUILD COMMAND STARTED **********
UATHelper: Packaging (Windows (64-bit)): CommandUtils.Run: Run: C:\Program Files\Epic Games\UE_4.17\Engine\Binaries\DotNET\UnrealBuildTool.exe UE4Game Win64 Development  -NoUBTMakefiles  -remoteini="C:\Users\ghost\Documents\Unreal Projects\CooP" -skipdeploy -noxge -generatemanifest -NoHotReload
UATHelper: Packaging (Windows (64-bit)): CommandUtils.Run: Run: Took 1.1254928s to run UnrealBuildTool.exe, ExitCode=0
UATHelper: Packaging (Windows (64-bit)): CommandUtils.Run: Run: C:\Program Files\Epic Games\UE_4.17\Engine\Binaries\DotNET\UnrealBuildTool.exe UE4Game Win64 Development  -NoUBTMakefiles  -remoteini="C:\Users\ghost\Documents\Unreal Projects\CooP" -skipdeploy -noxge -NoHotReload -ignorejunk
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: Performing 1 actions (4 in parallel)
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: [1/1] Link UE4Game.exe
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: LINK : fatal error LNK1104: cannot open file 'ucrt.lib'
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: ERROR: UBT ERROR: Failed to produce item: C:\Program Files\Epic Games\UE_4.17\Engine\Binaries\Win64\UE4Game.exe
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: Total build time: 39.25 seconds (Local executor: 0.00 seconds)
UATHelper: Packaging (Windows (64-bit)): CommandUtils.Run: Run: Took 39.4827719s to run UnrealBuildTool.exe, ExitCode=5
UATHelper: Packaging (Windows (64-bit)): Program.Main: ERROR: AutomationTool terminated with exception: AutomationTool.CommandUtils+CommandFailedException: Command failed (Result:5): C:\Program Files\Epic Games\UE_4.17\Engine\Binaries\DotNET\UnrealBuildTool.exe UE4Game Win64 Development  -NoUBTMakefiles  -remoteini="C:\Users\ghost\Documents\Unreal Projects\C
ooP" -skipdeploy -noxge -NoHotReload -ignorejunk. See logfile for details: 'UnrealBuildTool-2017.09.10-17.18.20.txt' 
UATHelper: Packaging (Windows (64-bit)):    at AutomationTool.CommandUtils.RunAndLog(String App, String CommandLine, String Logfile, Int32 MaxSuccessCode, String Input, ERunOptions Options, Dictionary`2 EnvVars, SpewFilterCallbackType SpewFilterCallback)
UATHelper: Packaging (Windows (64-bit)):    at AutomationTool.CommandUtils.RunAndLog(CommandEnvironment Env, String App, String CommandLine, String LogName, Int32 MaxSuccessCode, String Input, ERunOptions Options, Dictionary`2 EnvVars, SpewFilterCallbackType SpewFilterCallback)
UATHelper: Packaging (Windows (64-bit)):    at AutomationTool.CommandUtils.RunUBT(CommandEnvironment Env, String UBTExecutable, String CommandLine, String LogName, Dictionary`2 EnvVars)
UATHelper: Packaging (Windows (64-bit)):    at AutomationTool.CommandUtils.RunUBT(CommandEnvironment Env, String UBTExecutable, FileReference Project, String Target, String Platform, String Config, String AdditionalArgs, String LogName, Dictionary`2 EnvVars)
UATHelper: Packaging (Windows (64-bit)):    at AutomationTool.UE4Build.BuildWithUBT(String TargetName, UnrealTargetPlatform TargetPlatform, String Config, FileReference UprojectPath, Boolean ForceMonolithic, Boolean ForceNonUnity, Boolean ForceDebugInfo, Boolean ForceFlushMac, Boolean DisableXGE, String InAddArgs, Boolean ForceUnity, Dictionary`2 EnvVars)
UATHelper: Packaging (Windows (64-bit)):    at AutomationTool.UE4Build.Build(BuildAgenda Agenda, Nullable`1 InDeleteBuildProducts, Boolean InUpdateVersionFiles, Boolean InForceNoXGE, Boolean InUseParallelExecutor, Boolean InForceNonUnity, Boolean InForceUnity, Boolean InShowProgress, Dictionary`2 PlatformEnvVars, Nullable`1 InChangelistNumberOverride, Dictio
nary`2 InTargetToManifest)
UATHelper: Packaging (Windows (64-bit)):    at Project.Build(BuildCommand Command, ProjectParams Params, Int32 WorkingCL, ProjectBuildTargets TargetMask)
UATHelper: Packaging (Windows (64-bit)):    at BuildCookRun.DoBuildCookRun(ProjectParams Params)
UATHelper: Packaging (Windows (64-bit)):    at BuildCookRun.ExecuteBuild()
UATHelper: Packaging (Windows (64-bit)):    at AutomationTool.BuildCommand.Execute()
UATHelper: Packaging (Windows (64-bit)):    at AutomationTool.Automation.Execute(List`1 CommandsToExecute, Dictionary`2 Commands)
UATHelper: Packaging (Windows (64-bit)):    at AutomationTool.Automation.Process(String[] Arguments)
UATHelper: Packaging (Windows (64-bit)):    at AutomationTool.Program.MainProc(Object Param)
UATHelper: Packaging (Windows (64-bit)):    at AutomationTool.InternalUtils.RunSingleInstance(Func`2 Main, Object Param)
UATHelper: Packaging (Windows (64-bit)):    at AutomationTool.Program.Main()
UATHelper: Packaging (Windows (64-bit)): Program.Main: AutomationTool exiting with ExitCode=5 (5)
UATHelper: Packaging (Windows (64-bit)): BUILD FAILED
PackagingResults: Error: Unknown Error

When i try and package any other project, it just repeats SafeCopy- something every 10 seconds and then just fails. Im now installing ue4.16 to try with it.

And I cant downgrade my project, it just deletes everything.