When you say 'compromised' do you mean that these parts of your beloved P3 are slowly dying, or do you mean that you suspect malware infection ? If it is the latter, then I can recommend Malwarebyres and Super Antispyware to you for assessing this problem, and CCleaner for getting rid of temporary files cluttering up your system.
With regards to the first two, if they do find any 'nasties' which they cannot deal with themselves, then start a topic in the 'Am I infected' section of BC stating what you have done. And as for CCleaner, a great little utility, just DO NOT use the registry cleaning tools that come included in it. Unless you have expert knowledge in the area of the Registry it is far better left alone.
If the problem is your P3 is just dying by inches, you have the cure in hand as a work in progress.