I recommend you UnHackMe - Ultimate Malware Killer for fast malware removal:
Free Download Fully Functional 30-day Trial. No credit card is required.
Reviews. EULA. Privacy Policy. Uninstall.
The file FIREFOXUP.EXE is malware related.
You must delete the file FIREFOXUP.EXE immediately!
Delete the file FIREFOXUP.EXE without delay!
Kill the process FIREFOXUP.EXE and remove FIREFOXUP.EXE from the Windows startup.
FIREFOXUP.EXE Information and Removal:
MD5 of FIREFOXUP.EXE = BAB270CD7913B3D4B6A8B4C041B2C0F0
FIREFOXUP.EXE size is 831488 bytes.
Full path on a computer: %APPDATA%\FIREFOXUP\FIREFOXUP.EXE
Related Files:
%APPDATA%\FIREFOXUP\FIREFOXUP.EXE
%TEMP%\4TXKSSYB.EXE
%TEMP%\CSCOMP.DLL