Win32:Trojan-gen.

I have Windows XP Pro. Edition and I got a Win32:Trojan-gen. {Other} in C:\System Volume Information_restore{D8E64BB6-0111-4B0D-9F2A-885A8BAC3D8F}\RP174 and its name is A0042617.exe. What should I do?

To get rid of the file, you have to turn off the System Recovery feature temporarily, as described e.g. here.