Question : system unable double click to access C drive

system unable double click to access C drive but able to access it by right click to open c drive

Answer : system unable double click to access C drive

It's a flashdrive infection, Flash_Disinfector.exe removes the malicious autorun.inf in every partition and also creates a bogus autorun.inf to stop the spread.
Download and run this tool and follow the prompts:
http://www.techsupportforum.com/sectools/sUBs/Flash_Disinfector.exe


Here's the same problem already in the FAQ:
http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Windows/XP/Q_22998464.html