In an interview with the Financial Times, JT Wang, said: "We have said [to Microsoft] think it over. Think twice.
“It will create a huge negative impact for the ecosystem and other brands may take a negative reaction. It is not something you are good at so please think twice."
In the same interview, Campbell Kan, Acer’s president for personal computer global operations, claims Microsoft risks putting its relationship with its manufacturers in jeopardy if it moves further into the hardware arena.
He said: “Microsoft hasn’t given us a very clear picture… Does it just want to show a new concept to the market and are they going to still work with [PC makers]… or is it going to get into the hardware business?
"Should we still rely on Microsoft, or should we find other alternatives?"
Microsoft, which announced its first public loss as a company last month, aknowledged Acer's concerns in a recent regulatory filing, which read:
“Our Surface devices will compete with products made by our OEM [original equipment manufacturer] partners, which may affect their commitment to our platform.”
The Microsoft Surface was announced in June and is expected to be released later this year. There will be two versions of the slate, the Surface, which will run on Windows RT and use an ARM CPU, and Surface Pro, which will run on Windows 8 Pro and use an Intel CPU.
The Surface will have a 10.6-inch HD Display, while the Surface Pro will come equipped with a Full HD Display. Microsoft's manufacturers, including Acer, are still in the dark about how much Microsoft plans on charging for the Surface, although experts believe the slate could cost up to £1,200.