It was a case of "unlucky 13" for Microsoft yesterday as the software giant issued a record 13 patches for 34 vulnerabilities in all versions of Windows – including Windows 7.

The previous record number of vulnerability fixes for a Patch Tuesday was in December of last year when the company fixed 28 flaws.
Of the 13 security updates issued yesterday, eight were listed as "critical" and seven as "important". Twenty one of the 34 bugs were listed as "critical".
Eight of the patches are aimed at vulnerabilities in Windows' Graphics Device Interface (GDI+) which is a core component of both Wndows Vista and the keenly-anticipated Windows 7 which is scheduled to go on sale on 22 October.