Driver for Aspire 521 E5 problems

Model: Aspire E5 - 521
(UEFI) BIOS version: ATI VGA VER015.042.000.002.000000
Windows operating system of origin: 8.1
New operating system: Windows 7 64 bit
Question type: Could not find Chipset Device Driver PCI, PCI encryption/decryption controller, SM Bus controller and USB controller.

Hi guys! I bought this camera last week, and it was a bit slow for me. Thinking it could be the OS, I changed it to Windows 7 64 bit, which is currently installed now. I had problems to find the drivers for it. I used the drivers found here: http://us.acer.com/ac/en/US/content/drivers but I noticed that 'Operating System' told ' 8.1 64-bit Windows.

Yet, I used these drivers listed there. However, after installing the drivers, I still see yellow-exclamation on the following points:
-PCI device
-PCI encryption/decryption controller
-SM Bus controller, and
-Controllers of Bus USB universal

I also noticed that my machine is still sluggish after installing the drivers from this page, I really hope you can help me on what I've been struggling since yesterday thank you in advance.

Open Manager devices by clicking the Start button, click Control Panel, click System and security, and then, under system, clicking Device Manager.
If you are prompted for an administrator password or a confirmation, type the password or provide confirmation.

When you see the yellow exclamation point, double click it, choose the "Details" tab, in the menu choose "HardwareIDs", click on the first string and copy/paste here.

Tags: Acer Laptops

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