hmmmm, this is a vexing one!!!! im not sure if this post will help. i see that you are using a pc. on a mac you can run coloursync utility, kinda like a disk utility but for all the colour gammas and profiles and all that good stuff on the entire machine. it will tell you that x number of profiles over time have shifted and need to be repaired. click ok and it repairs it all for you. check if your pc has a similar utilty and run it. you will be shocked at how much things get damaged! if it does not solve the problem at least all yor profiles will be as good as new.

if you do any text in another programme i.e illustrator, although it is vector, when you export it, paste it, or import it form, into photoshop, it will rasterize it, ie. pixelate it. the best thing is to stay in photoshop, use a hi res. document and check the anti-alias box. provided the text is on its own layer, you may then run some filters to smooth it out even more. gussian blur it then unsharp mask a few times, just a little at a time it if you have just the original filters( not the best method ). there are a lot of 3rd party filters that smooth out jaggies and are very powerfull, but are costly and need to be hunted down. unsharp masking it in the k (black) channel will result in a cleaner ,crisper look.( if you are working in cmyk mode)