I will be going to a concert today in Shimokitazawa, of my favorite singer and song-writer. I'm looking forward to it!

Yes both are correct, (spelling correction: had). It really depends on the situation. For example, use "found" for possibilities, and "had found" for regrets or past alternatives.

Looking in this sense is appearance. She either is young, or did something/wears something to make her appear young.

Hi Alex, We have made an offer to our customer based on the prices we received from you yesterday. A winner will be revealed next week. Should we win, we must act immediately to make the purchase. We shouldn't waste even a day as delivery takes up to one month.

Could you please quickly check my grammar? The programs like Advanced SystemCare Free, Auslogics BoostSpeed, Glary Utilities, and Wise 365 aren't beneficial; they claim to be computer cleaning tools but are actually viruses. Seeking advice from an IT expert is wise. Reg Organizer, which can replace CCleaner in countries where it's forbidden, offers features not found in other programs, and is a safer alternative; the others are indeed viruses. It's important not to trust programs provided on the internet blindly. Another safer and better option is to clean manually. As for the way to speed up computers: Press the Windows + R keys simultaneously on the Windows logo, and a small command window will open on the lower left, after typing "%temp%" there (temporary operating system), press enter key or click the "ok" on the left. In the window that opens, ctrl + A at the same time click and select all the accumulated junks and delete them with shift+delete, then you can also select and delete the cells in that folder by writing "temp" without interest. This will be good for your computer. If you do the same once every week, (then using farcical has face?). Keeping the desktop tidy, as well as setting a simple picture as the background, has truly tremendous benefits. When the desktop is messy, it decreases computer speed by placing unnecessary strain on the operating system (hard drive) and takes time to access the programs we have opened. Additionally, when changing to a range of pictures, it spins the hard drive rapidly, which slows the computer down. Windows has a "refresh" feature, but it is not an optimizer; rather, it is for operating system updates.