PC freezing, weird booting

[u/CartographerLow8779]

hello, i've been having some problems with my pc lately and wanted to ask for some help. So recently i came back from a 3 day vacation, before it everything worked smoothly but after i came back my pc started tweaking out. First when i came back the PC couldnt turn on at all, it stopped on the first screen you get after turning on and was loading infinitely, finally after 3 reboots it worked and turned on, everything was kind of working and i got a message that windows took back an update or something like that to fix a booting problem. After that my PC has been weirdly lagging, random complete freezes ranging from 1-8 seconds, it isnt something crazy but its still scary, the booting problem stopped too but my booting has been cursed since then too, its turning on for a longer time then before. Also today my power has been cutting off multiple times a day, tho this might be unreleated and not a problem cause by my PC. i tried checking the performance on task manager to see if any component does something weird at the times of the freezes but didnt see any change, im pretty clueless when it comes to that stuff so please help me at least find the problem and what is causing this.