Issues with Prebuilt PC – Slow Performance & Freezing

Hi experts,

I’m not very knowledgeable about building PCs, so I ordered a prebuilt one from Inet, a well-known site in Sweden, to avoid any issues. Unfortunately, I’m now running into several problems with my new PC. See below, please help!

Slow startup: The PC takes a long time to boot, showing a completely black screen

Window switching delays:

• It takes a long time to switch between windows.
• Sometimes, when using Alt + Tab or clicking an icon, the window doesn’t change immediately. I have to tab multiple times before it responds.
• During this delay, inputs are still registered in the background. For example, if I'm in a game, I can still move and type, but I only see the changes once I finally tab back in

Browser freezing issues:

• The browser randomly freezes, though everything else is working, I can still move the mouse, sounds are playing, and previews are showing when hovering over pinned programs.
• A temporary workaround is to drag the browser down (minimizing it slightly) and then back up to fullscreen.
• Sometimes, only part of the browser freezes—for example, if I scroll, only the bottom half of the page moves. The same minimize-fullscreen trick temporarily fixes this.

Crash

• While playing Dota, the PC completely crashed. The sound turned into a constant buzzing noise, and nothing responded. I was forced to hold down the power button to restart the system.

Spec:

• Taurus Gaming Case RGB
• AMD Ryzen 5 7600X 4.7 GHz 38MB
• ASUS GeForce RTX 4060 8GB Dual OC EVO
• ASUS TUF Gaming B650-Plus WIFI
• Corsair 32GB (2x16GB) DDR5 6000MHz CL36 Vengeance
• Kingston NV2 M.2 NVMe Gen 4 1TB
• DeepCool AK400 Zero Dark
• Corsair CX650 650W
• Windows 11 Home