Install Signatures Error, V8.2.0.4591

For the past few days I’ve been receiving warnings that my virus signatures were out of date. Whenever I tried to fix this by clicking the “Fix it!” button, I got an error downloading signatures. I figured it might be a sever problem and decided to wait and see if it wold resolve itself. After a couple of days the error changed. It now completes the signature download but fails at the install signatures step. I have tried manually downloading the latest database file and importing it, but that also fails stating “class not registered.” Please help me resolve this problem thank you.