The most common and most likely answer to this crossword clue is the 9 letter word REBOOTING
I've seen this crossword clue in The Daily Telegraph
R
E
B
O
O
T
I
N
G
More clues leading to the result REBOOTING
Buddy explains!
The straight part
We know that "getting PC going again" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case getting pc going again = rebooting.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does REBOOTING mean?
REBOOTING verb- To execute a computer's boot process, effectively resetting the computer and causing the operating system to reload, possibly after a system failure.
- To start afresh.
- Restart; to return to a an initial configuration or state.
- The act by which something (a computer, a TV series, etc.) is rebooted.