"Please wait…" error infinity loop

Question

Yesterday I installed Windows 10 SkinPack on my Windows 7 and everything seemed fine until I needed to install SkinPack Patcher and I did it. When installation was complete it asked me to restart my computer. I did that and my computer came to "Please wait…" screen and I heard that turning on sound but that "Please wait…" screen stayed like that for couple of minutes. Then it turned off and instantly came again to that screen. My PC was doing that for almost half an hour. I shot it down with pressing button on keyboard because I wasn't able to do anything on-screen. Today I tried to enter Safe Mode with pressing F8, spacebar, F5 (tried almost all "F" buttons) but that didn't worked. I also tried to disable "Quiet Boot" (in BIOS, I'm not sure if that Quiet Boot is called like that). Nothing gave me results and I'm desperate. Please help me because this is my only computer and I have too much important data on it. If this would help, I have Acer Aspire running Windows 7 Ultimate.

Answer 1

I did pressed F8 rapidly but, as I stated, nothing worked.

-> You now need to do this to get into Repair Mode:

1. Ask a friend with a Windows 7 PC to burn a System Repair CD for you. It takes less than five minutes via the Control Panel / Backup and Restore.
2. Set the BIOS so that it uses the CD drive as its primary boot device.
3. Boot the machine with the Repair CD.
4. Perform a System Restore.

My parents don't understand importance of external disks and all those computer things. If they do… I would have Mac, not Windows. :)

-> A Mac needs regular backups as much as a PC does.

Answer 2

I tried to enter Safe Mode with pressing F8, spacebar, F5 (tried almost all "F" buttons) but that didn't worked.

-> Here is what you need to do:

1. Tap F8 rapidly at boot time.
2. Select Repair from the menu.
3. While in Repair Mode, use System Restore to set Windows back by two days.

I have too much important data on it.

-> Remarks like these frighten me. They imply that you are unaware of the basic rule that important data must reside on at least two independent media. Backing up your data regularly (e.g. weekly) to an external disk in a USB case is an absolute must. A 500 GByte disk would cost less than $60.

I did pressed F8 rapidly but, as I stated, nothing worked. I even tried to pull out battery and charging cord from my laptop and that should bring up Safe Mode next time I turn on my PC but that didn't worked either. 

I'm student, 17, and my parents don't understand importance of external disks and all those computer things. If they do… I would have Mac, not Windows. :)

Answer 3

I tried to enter Safe Mode with pressing F8, spacebar, F5 (tried almost all "F" buttons) but that didn't worked.

-> Here is what you need to do:

1. Tap F8 rapidly at boot time.
2. Select Repair from the menu.
3. While in Repair Mode, use System Restore to set Windows back by two days.

I have too much important data on it.

-> Remarks like these frighten me. They imply that you are unaware of the basic rule that important data must reside on at least two independent media. Backing up your data regularly (e.g. weekly) to an external disk in a USB case is an absolute must. A 500 GByte disk would cost less than $60.