I am thinking of upgrading the old family Dell computer.
I dont really have a budget since i only came up wih the idea yesterday.
Would it be worth spending money on upgrading it or will i save up for a new computer?
It wouldnt be used for major stuff,just some minor gaming and editing.
The computer runs okay but is slow and gets a blue screen sometimes.
What bits would need upgrading and how much would it cost?
As zooted said, we need more information. From what I heard, It sounds like you'll be better of buying a whole new computer. You can get a fairly decent computer that is capable of gaming for around $450 (without OS) and if your HDD is a SATA HDD, then you'll be able to reuse it. I also would not upgrade a pre-built computer because it normally doesn't have anything that is upgradeable, and with Dell PCs, the older versions have different PSUs than what is the norm and if you do it wrong, it could destroy your computer.
This is my computer build for you that is capable of light gaming and editing: