Hi, I have just experienced the sysguard.exe problem with the pop ups and tried all of the online advice to get rid except downloading so called removal tools. I then downloaded the free version of malwarebytes anti malware but it would not open giving "runtime errors" etc. I used system restore in safe mode to take the computer back one week and tried again and anti malware started no problem. I then ran it but it was unable to find any problem. I suspected a free download of cute pdf to be the offending downlaod but I have no proof, although cute pdf is no longer an option in the printers folder. I have now upgraded and bought the full program and I am currently running a scan, but my gut feeling is that nothing will be found (nothing was found when I ran the free version) although since the system restore the computer appears to be running normally. I hope this helps getting malwarebytes to run but I am concerned that my PC is not "clean" Any help would be greatly appreciated. Chris