Is it safe to use a regular vacuum cleaner to dust off my pc?or a blower?

my pc is so dusty...i thnk i nid to clean it..can i use vacuum to do so?or a blower to dust off my pc?.......


not to mention that the vacuum and the blower are in a 1 machine...like my vacuum has a reverse job not just to suck but it has also to a blower(air out thingy)...
Update: does the air can do damage some components of the pc?like hard disk..etc
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