to keep or not to keep a laptop

hello,

I need some advice on weather to keep using my laptop as my primary machine or to go out and get a new laptop. the laptop that I have is a HP pavilion entertainment laptop that I bought several years ago. there are some issues with the machine that I think are minor but I am not sure. thgey are as follows
1) the machine is running vista. thought about upgrading to 7 but not sure if iy is worth it.
2) there is a blue bar running vertical on the left side of the screen it is about 1/2 inch from the side and is pretty thin. there is a green bar running vertical on the right side of the screen it is about 1/2 inch from the side and is pretty thin.
3) the battery icon in the taskbar displays that it is plugged in but not charging. I was getting the following message but now I do not get any more
HP Battery Alert
The system has detected the storage capacity of the battery stated below to be very low. For optimal performance, this battery may need to be replaced.
Primary (internal) Battery (601)
ENTER - Continue Startup

I have included a TSG sysinfo application and the info is below.

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft® Windows Vista™ Home Premium, Service Pack 2, 64 bit
Processor: AMD Turion(tm) X2 Dual-Core Mobile RM-72, AMD64 Family 17 Model 3 Stepping 1
Processor Count: 2
RAM: 3836 Mb
Graphics Card: ATI Radeon HD 3200 Graphics, 256 Mb
Hard Drives: C: Total - 292027 MB, Free - 176963 MB; D: Total - 13212 MB, Free - 2052 MB;
Motherboard: Hewlett-Packard, 30FC
Antivirus: avast! Antivirus, Updated and Enabled

If there is anything else that you need, please let me know and I will get it for you