If I boycott US products it would either because I dislike that specific company (Macdonalds, Coca Cola)or because of the tradewar GW Bush launched almost directly after being"elected", he raised the tolls on steel and woodproducts. This not only affects Europe and Russia but also the Canadians and South Americans.
AND it won´t work because the US steel and lumber industry wont modernise their production and then they will get even more behind and inefficient compared to nonUS companies, which eventually led them to bankcrupcy. That´s what happened to our * shipbuilding industry in the 80s
About computer products most of them is manufactured in Asia (Skorea,Taiwan, Japan and China) so why care?
If you are against the war and against the Human rights abuses in China and want to boycott because of that then you simply cant buy any computers or electronics.