Problems started yesterday morning. Turned off computer in morning after overnight scan (it found tracking cookies). When computer was turned back on, it was much slower to start up than normally and was was slow to open programs or web pages (as slow or slower than when it is scanning or updating). Had difficulty in opening Task Manager and could not disable the internet connection before I gave up and turned off the computer. Spouse turned it on later and had the same sorts of issues; horribly slow, not able to disable the internet connection except by physically unplugging, very slow in opening Task Manager, hung up during a Restart, etc. Spouse did notice that something was causing a svchost.exe SYSTEM file to have high CPU and Mem Useage numbers in the Task Manager when it finally opened. I came back later and checked the Task Manager and noticed a process that I did not recognize (looked like one of those random letter strings, started with a C) and I stopped the process. That brought up a red warning box from McAfee. The computer is still performing poorly, getting hung up on Restarts, etc. It also appears that some things are missing; for example, I can't find Paint or the Character Map. Thank you for any assistance you can provide.