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:
CPU:
OPTION 1 AMD FX-4100 $110
http://www.newegg.com/Product/Prod [...] 6819103996 Despite some bad names about this CPU, it's a great CPU. It's extremely cheap for being a 4 core CPU and is PERFECT for a budget build.
Graphics: SAPPHIRE 100326DDR3L Radeon HD 6670 $80
http://www.newegg.com/Product/Prod [...] 6814102952 This is a great graphics card for the budget build. It will output amazing performance at 1680x1050. It's great for your purpose.
PSU: Antec EarthWatts Green EA-430D $54
http://www.newegg.com/Product/Prod [...] 6817371034 This is a great PSU from a reliable company. 430W is more than enough for your system and chances are, the PSU can even output more than it says it does.
Case: NZXT Gamma $40
http://www.amazon.com/GAMMA-Classi [...] B002UDK9U6 This is a great computer case. It was designed for a gaming computer and has lots of features. You won't find another case with the surplus of features similar to the Gamma at similar prices.
HDD: Seagate Barracuda ST500DM002 500GB $85
http://www.newegg.com/Product/Prod [...] 6822148767 HDD prices are through the roof nowadays, this is a relatively cheap HDD that is also from a reliable company.
RAM: Mushkin Enhanced Essentials 4GB $22
http://www.newegg.com/Product/Prod [...] 6820146748 4GB is more than enough for a light gaming and editing rig. Any more and you'll be overkilling the system. If you want, you can go with 8GB since it's so cheap, but I would stick with 4GB.
Heatsink+Fan: STOCK $0
DVD-ROM: LITE-ON DVD Burner - Bulk 24X $18
http://www.newegg.com/Product/Prod [...] 6827106289 This is a cheap, yet reliable, dvd burner. It should suffice you. If you watch Blu-rays or want to watch blu-rays, then you can go with a blu-ray drive instead.