I have several computers running on a Total Protection subscription. Most are working fine. One of my computers has consistently given me problems - it fails to update the virus DAT file on its own. When the DAT gets old enough I get the error message that updates were not successful and I should check my internet connection. Today I verified that all my other computers have downloaded DAT 6706.0 the current file. However, even by selecting "update now" I cannot get the problem machine to update the DAT file (it still shows 6705.0 which I loaded yesterday with a reinstall of the virsus software).
Background on what I have tried:
1. Uninstalled McAfee Total Protection and reinstalled Total Protection from "Myaccount" using the download icon (the latest DAT loaded but the file fails to update from that moment forward - "computer is unprotected" a week or so later)
2. Uninstalled McAfee Total Protection and used McAfee Removal Tool to clean up old files and remnants; reinstalled Total Protection with same results
3. Ran McAfee Virtual Technician and had on-line chat with McAfee tech - he reset Internet Explorer to factory settings; the DAT updated once so we declared success but then updates failed in future days. I have tried resetting IE again without success (repeating what the Tech did exactly)
4. Downloaded Malwarebytes and scanned for viruses which might be affecting the McAfee installation; removed Malwarebytes afterwards. No viruses found.
There is an "unused Subscription" showing in my account for this machine and it is current/valid/paid. However the machine with the problem NEVER shows as one of my protected computers even after a successful DAT download. In other words, I always show one subscription available and my account with McAfee never recognizes this machine as protected.
I am on a solid internet connection (ethernet, T1 line) and all of the other working computers are using the same connection successfully. There is no proxy server and I can connect to the internet just fine with this machine using Internet Explorer (which I understand is required for McAfee).
The machine is running Windows XP and has all the current updates, service packs, latest IE, JAVA, and Active-X is enabled. There are no other virus, malware, or adware programs on the machine (the McAfee Tech validated this as well). The only differences with this machine versus the others (some of which run XP and some Win-7) is that the machine was once part of a client-server system (versus connecting directly to the internet and LAN as it does now, it once had to go through an on-siteserver - I mention this in case there is something in the registry which I am missing) and this has a hyphen in its computer name (e.g. computer-name) which I can't believe would affect updates.
I am stumped why this one machine is giving me problems. Any ideas on what to try next?