Vista Woes
I acquired an ACER Aspire 3100 notebook mid-January. It came with Vista Basic. Being a nine year Symantec-Norton user I acquired N360 based on the PC Magazine review of the same month, and then I needed backup swe as Vista Basic comes with none, unlike earlier Windows versions. Acronis has been well reviewed, so I licensed True Image v10.
Since then, Symantec's N360 automatic (daily ongoing) virus definition update kept things nicely handled. Then, the May 30th update dorked N360, which then dorked any-all network access. Symantec Tech Support has been totally broke-dicked regarding Vista. They asked that I remove all Registry keys for Symantec (anything) but the VIsta problem blocking LAN-WAN access persists. My conclusion: Vista (DRM Hell) is stashing App data in it's own internal format such that complete Registry cleansing for a given App DOES NOT remove offending code ... and Symantec Tech Support is totally unaware of that.
Separately Acronis True Image and Disk Director Suite both employ SNAPapi, which under Vista goes into a loop consuming every available machine CPU cycle. AArrgghh!