Windows 7: System Restored removed SP1 but...

After I installed SP1 my computer was running very slow so I system restored it to remove it. Although no traces of SP1 are left on my computer, it's still unbearably slow and laggy. I was wondering if maybe installing SP1 again and uninstalling the correct way: (Programs and Features > View Installed Updates > Uninstall) will remedy this whole situation, but I'm kinda paranoid that the update will fail to install or BSOD my computer or something. What are some precautions I can take? and Is this a good idea? Thanks.

Please fill out your system specs so we know what kind of hardware you have. Click the first link in my signature for instructions on how to do it.

Ok, here are the system specs.


OS Name: Microsoft Windows 7 Home Premium

Version: 6.1.7600 Build 7600

Other OS Description: Not Available

OS Manufacturer: Microsoft Corporation

System Name: ZSA-ZSA-HP

System Manufacturer: Hewlett-Packard

System Model: HP G62 Notebook PC

System Type: x64-based PC

Processor Intel(R) Pentium(R) CPU: P6100 @ 2.00GHz, 1995 Mhz, 2 Core(s), 2
Logical Processor(s)

BIOS Version/Date: Hewlett-Packard F.23, 8/5/2010

SMBIOS Version: 2.6

Windows Directory:C:\Windows

System Directory C:\Windows\system32

Boot Device \Device\HarddiskVolume1

Locale: United States

Hardware Abstraction Layer: Version = "6.1.7600.16385"

User Name: Zsa-Zsa-HP\Jay

Time Zone: Pacific Daylight Time

Installed Physical Memory (RAM): 3.00 GB

Total Physical Memory: 2.86 GB

Available Physical Memory: 2.07 GB

Total Virtual Memory: 5.73 GB

Available Virtual Memory: 4.95 GB

Page File Space: 2.86 GB

Page File: C:\pagefile.sys

And if it helps, here's a screenshot, before and after the restore.

Before:


After:

So what's next? Should I install SP1 again and see what happens? I really want to get things back to normal again.