My PC Configuration is as follows:~ Intel P4 2.8Ghz; Intel D865GBF MotherBoard; 512MB DDR RAM; Software Config:~ Hard Drives: C(NTFS), D(NTFS), E, F(NTFS), G, H I have Windows 2000 on C Drive and Windows XP on D Drive. On November 19 evening, I installed Shareaza 2.2. Later at night I also used it. Till night everything was absolutely fine. When today I started my PC at 11.30 am and chose XP at the boot screen it said the following file is missing or corrupt: \Windows\System32\Config\System On pressing enter it rebooted and I am currently working through Windows 2000. Someone please help me immediately to recover from this problem as all my day-to-day work is concentrated on Win XP.