I am in the process of replacing my old computers (one desktop, one laptop) running XP & Office 2007 to new ones running Win 10 and Office 2016. I have one of the new computers and am getting it set up. I am having some problems with email, but I'll put that in another thread as it has to do with POP3 vs IMAP.

The problem here is that Outlook is running very slowly on the XP workstation. It has been getting more and more slow for some time. About a week ago, I mistakenly clicked on a link in an email and got infected with a nasty trojan horse. It brought the machine to its knees.

Yesterday, I had a local tech support guy come in and check it out. He identified the malware and said he got rid of it. He also did some other clean up. When he left, the system was running better than it had for some time and Outlook was starting up and running more quickly.

Last night, on his advice, I started another malware scan using Malwarebytes. I have the paid (Premium) version. When I got up this morning, it was still running. It had completed the scan and found no threats, but was stuck doing what it calls a "Heuristic Analysis". After more than 12 hours, I canceled it and rebooted. The machine is now slower than it was before the tech came. Outlook can take up to 20 minutes or more to start.

I have a call in to the tech again, but it's the weekend now.

Any suggestions as to what to do?