This XP-Pro computer was hit with a number of serious malware trojan's 2 weeks ago. After cleaning up the OS with MBAM and combofix, the printer (Epson workforce 500) multi function device has been very slow in responding to print commands. It can take 3 minutes to print the first page after requesting Print locally. Interestingly, when the same page is sent from another network computer it responds normally. I had the printer deleted and reinstalled with the latest drivers, to no effect. I'm convinced that the issue must be with the OS.
There have been some other connection problems, intermittent problems connecting to the Internet but I haven't been able to confirm this.