I borrowed another keyboard from a friend and tested it.The other keyboard worked fine.
So I suspected that it was a keyboard problem.I pulled out the CTRL KEYS of my KB and cleaned and reinserted them.
Next I took my keyboard and tested on my friend's machine and surprise ,THE CTRL KEYS worked properly.I tried CTrl+a,Ctrl+c/v/z/x,ctrl+alt+del all worked!!!!!!
Now when I brought back my keyboard and attached to my computer,IT WORKED FINE,THE CTRL KEYS worked properly.I tried CTrl+a,Ctrl+c/v/z/x,ctrl+alt+del all worked again!!!!!!
Now if that was not to be the last twist,suddenly the computer hanged.I rebooted and keyboard again worked properly!! but after some time THE CTRL KEYS AGAIN STOPPED WORKING and I am back to square one!!!!!!!!!!!!!!.
pls help.Also I would like to mention here that for quite a few days now,I have been getting the BLUE SCREEN ,the errors are random like IRQL_NOT_LESS_OR EQUAL,PFNLIST_CORRUPT,DRIVERIRQL_NOT_LESS_OR_EQUAL etc.Some times the files identified are win32k.sys or atidvag.sys or fastfat.sys etc.It also says some of my drivers may be outdated and some I feel are, since I am using this machine for around 4 yrs. though this may be completely