Sony is to carry out PlayStation Network maintenance for about one hour today, from 5pm UK / 9am Pacific.
The PlayStation Store, PlayStation Home and Account Management will be unavailable during the maintenance period.
"There may be some additional downtime after the maintenance period for testing purposes," Sony says.
The latest European PlayStation Store update rolled out on Wednesday, with highlights including the release of Spelunky for Vita and Saints Row 4 DLC.
The latest batch of European PlayStation Plus content is due to go live today. Subscribers will be able to download Assassin's Creed 3, The Jak and Daxter Trilogy and Stealth Inc on PS3, while Urban Trial Freestyle and New Little King's Story will be made free to download on Vita.
Earlier today, Sony released Vita firmware update 2.61. According to the platform holder, the update improves system software stability during use of some features.