An issue originally associated with Windows Vista upgrades has come back to haunt Windows 7, there’ve been some reports, that users noticing their feeds subscription stop updating after upgrades. If you're encountering this issue, first make sure that the feed URL is still valid by manually updating the feed (press F5 while viewing the feed in IE7). If no error shows up, then the following steps might help diagnose and fix the issue. Please let me know if they help/not help.
In the eventuality that no error is returned to end users: First “Check if Task Scheduler is running [with the following command:] sc queryex schedule. Look at the "STATE:" line, it should read "4 RUNNING" if it's not running, then start it: sc start schedule. [Next] check if RSS Download Engine is running: reg query HKCU\Software\Microsoft\Feeds /v SyncStatus and look at the "Status" line, it should read "0x01" or "0x1". If it isn't enabled, then enable it: msfeedssync enable,” stated vonKoch.