The 1055T is a great processor - how much memory do you have in your system at the moment? I find browsing with that many windows eats up RAM more than processor. For speeding up every day tasks, you would probably be better up installing a SSD for your operating system drive and upgrading your system memory. 8GB has become kind of the standard - it's not that you need 8GB, it's that 4GB isn't sufficient for everything most people run.
What kind of graphics card do you have in your PC? That might be another thing to look at upgrading.