A dodgy Symantec update brought pain for those remaining Windows XP users who rely on Norton to defend their undead operating system free from viruses.
In a statement, Symantec admitted the problem but downplayed its significance.
This issue has now been resolved. The limited number of customers affected should run a Live Update to mitigate the issue.
The flaky update, released a day before the recent Labor Day US holiday weekend, behaved as "badly as a virus", according to Reg reader David.
"It costs a lot of pain before you work out it was Norton... I have 3 PCs with XP and Norton and eventually the penny dropped and I wandered onto their forums to find other folk with the same issues," he added.
Symantec's “top tips” for resolution initially included upgrading to Windows 7 and switching off browser protection, according to David, a paying customer who was less than impressed with the security giant's handling of the incident.
Other people experienced similar pain as documented in a discussion thread about the issue on Symantec's support forums. Most reported that applying the updated crashes affected systems.
Dodgy updates are frequent bug-bear in antivirus protection that hits all vendors from time to time. Difficulties are at their worst when system files are incorrectly identified as potentially pox-ridden.
Extended support for Windows XP ended in April 2014 but the 12-year-old operating system is still widely used and there's still a business, of sorts, selling security software to protect it from nasties. ®