Re-Installed Windows 7 using recovery partition, system is slow now

Everything you need is here to get and keep a perfect Clean Reinstall - Factory OEM Windows 7.

Be sure to read the Special Note for Dell OWners at end so you can run the bootable Dell Diagnostics to see if they still run in which case I'd keep the first partition while deleting all others for the reinstall.

Thank you for all the suggestions, I have downloaded Windows 7 iso, and will be following the instructions given in that thread, I just hope I do it right because I have never formatted/installed Windows before.

Also I ran these tests, and they all seems Ok.









^ this last test ran for like 7 hrs but everything was fine.


Is there any other test I should run or check anything else before doing a clean install?

Load/install Ubuntu onto a USB and run 'Try Ubuntu without installing'. See if it works for your pc. That can be considered to be another HW test.

note: used a free program: Rufus to create a bootable USB from a .iso file.
-1) plug an appropriately sized USB into your pc. A 4G is sufficient. Smaller may work too, dunno.
-2) select: Create a bootable disk using .iso image. Then click on the little icon to the right to pick the file.
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BTW: not a big Linux supporter. It does come in handy at times however.

Whats Ubuntu?

If the hardware is clear and the test runs from boot, then I would save the first partition during the reinstall, deleting all others using the Drive Options pictured in Steps 7 and 8 of Clean Install Windows 7 which are the actual illustrated steps for the install itself.

There's no reason to fear the reinstall as you have everything needed to get and keep and perfect one if you stick with the steps in Clean Reinstall - Factory OEM Windows 7. This compiles everything that works best in tens of thousands of installs we've helped with here.

You only need to ask back if you have any questions.

Run a few Startup Repairs to see if it finds anything awry.

Enable Automatically deliver drivers via Windows Update (Step 3) then run all Important and Optional Windows Updates, with reboots, until there are no more when you Check for Updates.

Then check for any Devices missing drivers or in error in Device Manager. Import them from the Support Downloads webpage for the model PC or device.

If this fails import the chipset for that mobo from the PC or mobo's Downloads webpage, install it.

If you need any help with these ask in our Drivers forum where they can find and install any driver.

Then what I would do is work through Troubleshooting Steps for Windows 7

gregrocker said:

Run a few Startup Repairs to see if it finds anything awry.

Enable Automatically deliver drivers via Windows Update (Step 3) then run all Important and Optional Windows Updates, with reboots, until there are no more when you Check for Updates.

Then check for any Devices missing drivers or in error in Device Manager. Import them from the Support Downloads webpage for the model PC or device.

If this fails import the chipset for that mobo from the PC or mobo's Downloads webpage, install it.

If you need any help with these ask in our Drivers forum where they can find and install any driver.

Then what I would do is work through Troubleshooting Steps for Windows 7

I just did a clean installation, wasnt that enough to repair whatever is wrong with it? I mean there was no driver or anything installed at that time and still I was getting the black screen at startup.

Anyways, ran Startup Repair, it didnt find any error.
Windows is up to date.
There is no error in Device manager, everything is installed perfectly.
Also went through almost all steps in 'Troubleshooting Steps for Windows 7'

I also googled this problem of getting Black screen before login screen, and found out that there are many who faced or facing this problem, some fixed it by themselves and it was related to graphic card or HDMi port.. My graphic card is perfectly fine and there is nothing connected with HDMI, I only have a mouse attached to my laptop and charger, thats it.