@proxos666
With World of Warcraft, Guild Wars and Star Wars having the same issue it doesn't look like it's a game related thing.
Games like Skyrim, Saint's Row 4, Mortal Kombat 9 and Oblivion are unaffected.
I cleared off a few files of adware and malware in my Temporary Internet Files.
CPU usage while in game is high at 80% or higher.
I ran a check disk on both hard drives without any problems. Boot disk scan is going to be run overnight.
Disk defrags will be done within the next week but beyond that I don't know what else I can do; I want to reinstall my PC only as a last resort. I've considered system restore but there are no restore points to where I didn't have these issues.
I don't believe it's a hardware issue because, and this is supposition as I'm no expert, then all the games should be affected in some way even if SWToR, GW and WoW are the most demanding on my PC, but I do meet the recommended spec for those three games so there shouldn't be an issue. Reducing graphics settings doesn't help at all in either of the 3 games so I've restored the defaults.