minecraft launcher error

17:50:11 FATAL]: Fatal error launching game. Report this to http://bugs.mojang.com/ please!
java.lang.RuntimeException: Classpath file not found: C:\Users\User\AppData\Roaming.minecraft\ms-starter.jar
    at net.minecraft.launcher.game.MinecraftGameRunner.constructClassPath(MinecraftGameRunner.java:396) ~[launcher_mcpatched.jar:1.6.89-j]
    at net.minecraft.launcher.game.MinecraftGameRunner.createArgumentsSubstitutor(MinecraftGameRunner.java:300) ~[launcher_mcpatched.jar:1.6.89-j]
    at net.minecraft.launcher.game.MinecraftGameRunner.launchGame(MinecraftGameRunner.java:169) ~[launcher_mcpatched.jar:1.6.89-j]
    at com.mojang.launcher.game.runner.AbstractGameRunner.onDownloadJobFinished(AbstractGameRunner.java:186) [launcher_mcpatched.jar:1.6.89-j]
    at com.mojang.launcher.updater.download.DownloadJob.popAndDownload(DownloadJob.java:122) [launcher_mcpatched.jar:1.6.89-j]
    at com.mojang.launcher.updater.download.DownloadJob.access$000(DownloadJob.java:12) [launcher_mcpatched.jar:1.6.89-j]
    at com.mojang.launcher.updater.download.DownloadJob$1.run(DownloadJob.java:86) [launcher_mcpatched.jar:1.6.89-j]
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_131]
    at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_131]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_131]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_131]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_131]