malwarebytes.org. Download and install free version. Might have to do it in safe mode by pressing F8 at boot. (thumb drive?) In Internet Options under control panel, connections tab, LAN settings, clear any proxy settings. Update malwarebytes fully. If it wont install/run in normal mode, install/run in safemode. Run full scan in safe mode and remove what ever it finds. Then, boot into normal mode, update and run it again. You must run and have no infections in normal mode as not all .dll files are loaded in safe mode. Start, run --> MSCONFIG-->startup tab Anything that looks like 83fg34asfr43r.dll or .exe remove the file at its location and run REGEDIT and remove its start up key. Usually under HKLM/software/microsoft/windows/currentversion/run