Dell inspiron laptop, Windows Vista,.
Initially thought it was infection, scan with spybotsd, malware bytes, avira av, rootkitty, revealed no infection in safemode and ubcd4win 3.6.
System restore doesn't restore anything back. It always gives an error System restore to and earlier date gives error 0x80070570, The file or directory is corrupted and unreadable.
System file checker gives is unable to repair all files. I will attach log later and give info about blue scree.