windows file infected

when i run boot-time scan avast detected rg3.dll & rg4.dll is infected by Win32:Malware-gen. i choose 1.Fix automatically but it prompted me a message “the file is in windows folder, are you sure?” well, i am novice at such a thing so that message creeping me out. is those two .dll file really infected or it just false alarm?

Upload and test file(s) here www.virustotal.com if tested before, click rescan for a fresh result
Post link to scan results here

Monitoring.

here is the scan for rg4.dll and rg3.dll from virustotal.com

https://www.virustotal.com/en/file/36541549605605f20df3533269fcc6a21dbb921bcc0cea7798bbb2f5699cb7ca/analysis/
https://www.virustotal.com/en/file/d1288720c5eb95fe8d17ae3e3dbab6f265455ff8182efdb3a429b2fcbef362d1/analysis/

Analysis date: 2015-03-09 13:52:33 UTC ( 11 months, 4 weeks ago )

Analysis date: 2015-02-23 03:23:10 UTC ( 1 year ago )

as i said in post above >> if tested before, click rescan for a fresh result

anyway seem to be a clear case of infected files

is it okay to remove the file and nothing wil goes wrong with my windows later?