When you said you removed the bloatware (the extra crap that comes on laptops) I assumed you were doing so to clear up hard drive storage space. Also, you referred to hard drive space in the title, and made numerous other references to things that would be related to storage space aka your 'hard drive'.
You see, 'Memory' and 'Hard Drive' are two very different things. Memory is used temporarily (that's the 4GB number you refer to) and cleared every time you reboot ... whereas your hard drive is your 'storage', which is 'permanent' and it's size would be much larger than that (do you know how to check the capacity, and % usage of your C: drive?)
What is your OS? Windows XP, 7, 8, 8.1 or 10?
I need to know more about what 'actual problems' you're having. "drops me out of my browser often" is much too vague.
To be clear, having 'not enough RAM' vs 'not enough storage space' ... these have very different manifestations, and solutions. They're two entirely different things.
4GB of ram is workable for casual use on windows XP and 7, but definitely pushing it for >=Windows 8. However, mostly what your OP discussed was things related to storage i.e. hard drive space, so which of these two possibilities is actually the problem ... is the first order of business.