Windows 7 gadgets, color or display error

Windows 7 + Internet Explorer 11 + higher resolution, than 100%

Windows 7 weather gadget will change color and some programs starting normally, but only viewed on tray.

Fix:
Gadgets work fine again when you change the DPI (Display Size Settings) to 100% Smaller Fonts. 

Source: answers.microsoft.com

How to backup and restore Skype profile on Windows?

How do I back up my configuration and instant message history (Winodws XP/Vista/7/8)?
https://support.skype.com/en/faq/FA413/how-do-i-back-up-my-configuration-and-instant-message-history

After reinstalling your Windows, copy back your saved Skype folder to the new system's Skype directory (overwrite it).

HP 250 G1 Notebook Windows 7 LAN driver

Realtek Ethernet Controller Driver

Ralink 802.11 b/g/n WiFi Adapter

Update:
It seems HP finally "did the homework" and put the correct Windows 7 LAN driver to the 250 G1 driver list.
Here is the download link.
(If this driver at the last link does not work, see the first link, that certainly works.)