“We currently have 25 stores closed and 100 more with problems,” said Lennart Agén, a Systembolaget spokesperson, to news agency TT.
“We have been working with this all night and hope to be able to solve it within a couple of hours and be back at full speed tomorrow,” he continued.
Agén was unwilling to give any indication as to the problems suffered by the monopoly retailer.
“We don’t look at it like that, the most important thing is to able to provide service to our customers,” he said.
The problem has been caused by a fault in an anti-virus system made by US software firm McAfee.
“The antivirus programme was sent to our stores overnight. The fault has affected a great number of firms worldwide and Systembolaget is one of these,” the firm writes on its homepage.
As long as the problems persist Systembolaget will not be allowed to open its stores.
The problems reportedly stem from a faulty update which has reacted against an important systems file in the Windows XP operating system.