Hey Gregg I had things disappearing on this and other sites as well, I was also having a problem with my computer running very slow and stalling during downloads . I took it into London drugs where I bought it for them to check it out.
They installed a free malware program, ran a full scan and found approx. 40-50 malware infections. Apparently these can cause things disappearing so they say.Problems solved, I now run a full scan for malware once a week to keep everything clean.
I use Malwarebytes free download.
